package Demo;

public class Test {
    public static void main(String[] args) {
        long time = System.currentTimeMillis();
        System.out.println(time);

        int[] arr1 = {1,2,3,4,5,6,7,8,9};
        int[] arr2 = {9,8,7,6,5,4,3,2,1};
        System.arraycopy(arr1,4,arr2,5,1);
        for (int i = 0; i < arr2.length ; i++) {
            System.out.print(arr2[i] + " ");
        }
        System.out.println();
        StringBuilder xx = new StringBuilder();
        xx.append("jkcxtcvjkhvgfsgvhscbsjdvckav");
        xx.reverse();
        System.out.println(xx);
    }
}
